objtool/klp: Extricate checksum calculation from validate_branch()

In preparation for porting the checksum code to other arches, make its functionality independent from the CFG reverse engineering code. Move it into a standalone calculate_checksums() function which iterates all functions and instructions directly, rather than being called inline from do_validate_branch(). Since checksum_update_insn() is no longer called during CFG traversal, it needs to manually iterate the alternatives.

Josh Poimboeuf committed 7 months ago

Commit 30cae581 parent 6282e9f2 files · +80 −32Browse files

Showing the changes to tools/objtool/include (1 of 2 files). Show all

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tools/objtool/include/objtool/checksum.h+1−5

@@ -33,11 +33,7 @@ static inline void checksum_finish(struct symbol *func) · 32 unmodified lines
33	33
34	34	#else /* !BUILD_KLP */
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36		−static inline void checksum_init(struct symbol *func) {}
37		−static inline void checksum_update(struct symbol *func,
38		− struct instruction *insn,
39		− const void *data, size_t size) {}
40		−static inline void checksum_finish(struct symbol *func) {}
	36	+static inline int calculate_checksums(struct objtool_file *file) { return -ENOSYS; }
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42	38	#endif /* !BUILD_KLP */
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